One vertex per element, one color per generator, with an edge from x to x·s.
(1,2) involution — undirected(3,4)(5,13)(6,10)(7,11)(8,12)(9,15)(14,18)(16,17)(19,20)(21,26)(22,33)(23,28)(24,37)(25,29)(27,34)(30,45)(31,40)(32,42)(35,43)(36,41)(38,44)(39,47)(46,49)(48,50) involution — undirected(3,5,8,15)(4,9,12,13)(6,14,7,16)(10,17,11,18)(19,21,25,32)(20,26,29,42)(22,30,35,48)(23,36,24,31)(27,39,44,49)(28,41,37,40)(33,45,43,50)(34,47,38,46)(3,6,8,7)(4,10,12,11)(5,14,15,16)(9,17,13,18)(19,22)(20,27)(21,30)(23,34)(24,38)(25,35)(26,39)(28,43)(29,44)(31,46)(32,48)(33,37)(36,47)(40,45)(41,50)(42,49)(3,7,8,6)(4,11,12,10)(5,14,15,16)(9,17,13,18)(4,12)(9,13)(10,11)(17,18)(19,23,25,24)(20,28,29,37)(21,31,32,36)(22,34,35,38)(26,40,42,41)(27,43,44,33)(30,46,48,47)(39,45,49,50)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.